/Engine/Plugins/Experimental/PCG/Source/PCG/Public/InstanceDataPackers/PCGInstanceDataPackerBase.h
Build a PackedCustomData by processing each attribute in order for each point in the InstanceList
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=InstancePacking) void PackCustomDataFromAttributes ( const [FPCGMeshInstanceList](API\Plugins\PCG\MeshSelectors\FPCGMeshInstanceList) & InstanceList, const [UPCGMetadata](API\Plugins\PCG\Metadata\UPCGMetadata) * Metadata, const [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > & AttributeNames, [FPCGPackedCustomData](API\Plugins\PCG\InstanceDataPackers\FPCGPackedCustomData) & OutPackedCustomData ) const